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发明名称
摘要
申请公布号
NL255241(A)
申请公布日期
1964.03.25
申请号
NL19600255241
申请日期
1960.08.25
申请人
发明人
分类号
H01J61/18;H01J61/82
主分类号
H01J61/18
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